Part of a prosthesis



FIG. 1 is a perspective view of a part of a prosthesis according to the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawing views are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a part of a prosthesis, as shown and described. 